User-Configured Peer Information per LACP
In certain cases, when ports of one dynamic LAG are connected to two different LACP peers (different system IDs, or same system ID with different key values), the device forms one LACP trunk per dynamic LAG and the other port is moved to the error-disabled state. In a dynamic LAG, each member port stores a record of its peer’s LACP information (system priority, system ID, and system key) from the latest LACPDU it received. This information is known as the port’s peer information record. Because all member ports of an LACP trunk share the same local and peer information, the dynamic LAG's peer information record can be any one of its unique LACP trunk port’s peer information record (system priority, system ID, or system key). If a dynamic LAG has no associated LACP trunk, its peer information record is stored as NULL.
The
peer-info
command is used to configure the peer system ID and system key for a single dynamic
LAG.
The following example specifies the desired LACP peer under the dynamic LAG configuration to be defined as the LAG’s peer information record.
device(config-lag-DUT1)# peer-info sys-mac 609c.609c.609c sys-pri 10 key 29999 Config Peer info (system_priority=10,system_id=609c.609c.609c,system_key=29999) will replace existing dynamic Peer info (system_priority=1,system_id=609c.9f26.8d20,system_key=20001) for lag 1
show lag command to view information about the LACP peer's partner system ID (priority and
MAC address) and partner system key.
Dynamic LACP Syslog Messages
The syslog messages in the following table are generated when dynamic LACP is configured in the system.